(1/17) The Grand Canyon of the ____________________________ River expresses the park’s complex geologic history in dramatic colors and shapes.

(2/17) About ____________________________years ago, a huge volcanic eruption occurred in Yellowstone, emptying a large underground chamber of ________________(partially molten rock). Volcanic ash spread for thousands of miles in a matter of _______________.

(4/17) For an unparalleled canyon and waterfall experience, take a deep breath and descend this trail. A series of paved declines and more than ________steps lead you about ________feet (150 m) down into the canyon.

(5/17) This easy walk takes you to two viewpoints of the Upper Falls, which drops _________ ft (33 m) over a lip of volcanic rock.

(9/17) Depending on the time of year, anywhere between ______________________gallons per second.

(14/17) Turn right on a two-way road that takes you to this viewpoint. Enjoy the wheelchair-accessible view along the edge of the parking lot. The original Inspiration Point overlook tumbled into the Canyon during an __________________________ in the 1970s.